JP4645572B2 - Slicer - Google Patents

Description

  The present invention relates to a slicer that varies the reciprocating speed of a storage box.

  The prior art will be described with reference to FIG. In a slicer that reciprocates the meat box 6 by the crank mechanism and varies the reciprocating speed of slicing the workpiece, the rotation speed of the motor for driving the meat box that rotates the crankshaft is low or high, The crankshaft was always rotated at the same speed during one rotation.

  Especially when the reciprocating speed is set to high speed (normal slicer is 65 times / minute), when the meat box 6 moves in the direction B from the opposite side of the round blade 2, that is, when slicing the meat chunk, Since the inertial force of the meat box 6 works in the B direction, a moment M1 acting as a swinging force acts on the foot C of the main body, and when the storage box 6 moves in the A direction, the inertial force of the meat box 6 becomes the A direction. Moment M2 acts on the foot D of the main body. When the dead center portion of the crank mechanism, that is, when the meat box 6 reaches the opposite end of the round blade 2 or when the meat box 6 reaches the end of the round blade 2, inertial force is applied to the movement direction side of the meat box 6. The applied moments M1 and M2 are maximized. In a normal slicer, there are a drive device for the round blade 2 and a drive device for the crank mechanism on the round blade 2 side. Therefore, since the center of gravity of the main body is shifted toward the foot D side on the processing blade 2 side, the swinging moment tends to have a relationship of M2> M1. Therefore, the shaking swing force when the meat box 6 moves to the round blade 2 side tends to become the largest. Further, as the reciprocating speed of the meat box 6 is increased, the inertial force at the end in the A direction and the end in the B direction of the movement direction of the meat box 6 is increased, and the moments M1 and M2 that are the shaking swing force of the main body are increased.

  Normally, a slicer that changes the reciprocating speed of this type of meat box 6 (a normal slicer is approximately 30 to 65 times / minute) is always shaken by the moments M1 and M2. Therefore, in order to prevent the shaking of the main body, the mass of the main body including the workpiece so that the moment M1 and the moment M2 are balanced when the reciprocating speed of the meat box 6 is maximum (reciprocating speed 65 times / min) The reciprocating speed of the meat box 6 to be balanced was determined from the forces F1 and F2 applied to the feet C and D and the distance L between the feet C and D.

  In order to increase the efficiency of the slicing work, if the maximum reciprocating speed of the meat box 6 balanced with the swinging moments M1 and M2 is set, the inertia force of the meat box 6 cannot be absorbed by the balance force of the machine body. The entire slicer was shaken like a seesaw, and the foot C and the foot D were alternately lifted, and eventually the main body moved. In order to prevent this, if the dead point part of the crank mechanism part is detected by the detecting means and the speed in the vicinity of each dead point is reduced, the inertial force of each dead point part is reduced and the moments M1 and M2 are reduced.

  This is an effective means for a slicer that does not vary the reciprocating speed of the meat box 6 in one reciprocation. However, in the slicing operation, there are a case where the sliced meat is operated while being manually arranged, and a case where only the slice is performed.

  When slicing the meat while aligning the sliced meat, it takes time to align the meat manually, so the time for one round-trip of the meat box 6 is delayed, that is, the slice interval is increased. In addition, when only slicing is performed, the slice interval is shortened as much as possible in order to improve the slicing efficiency, and the reciprocating speed is high. For this reason, there is a slicer in which the time for one round trip is variable so that one unit can perform both operations. In this type of slicer, when slicing while manually aligning, the reciprocating speed is the most efficient reciprocating speed that can be sliced while aligning (usually about 30 times / min), and the inertial force of each dead center There are few moments M1 and M2. In this state, if the speed in the vicinity of each dead center is reduced, the interval between one reciprocation becomes longer, resulting in a decrease in work efficiency.

  In addition, if the detecting means for detecting each dead point section fails during high-speed operation (speed exceeding 65 times / minute), the speed in the vicinity of each dead point is not decelerated and the slicing moment of the slicer increases. , It will be a situation that the body starts to move.

  In order to balance the swinging moments M1 and M2 with the reciprocating speed of the meat box 6 increased, the forces F1 and F2 applied to each part of the main body are increased, that is, the weight of the main body is increased, or between the feet C and D It is necessary to lengthen the distance L, which leads to an increase in the size and weight of the slicer body.

  In order to prevent shaking while increasing the reciprocating speed of the meat box 6 with a small space and light slicer, the main body feet C and D can be completely fixed to the floor with anchor bolts, etc. If fixed to the floor, the main body cannot be moved, and there is a problem that it is impossible to perform a cleaning operation to remove debris of a workpiece under the main body.

  The object of the present invention is to eliminate the disadvantages of the prior art described above, and the detection means for detecting the position of the storage box fails when the movement speed of the storage box is increased while maintaining the space saving and weight reduction of the slicer body. However, it is to reduce the swing of the slicer body.

In order to achieve the above-described object, the present invention provides a round blade as a processing blade arranged on a machine base, a round blade motor for rotationally driving the round blade, and a rail fixed to the upper part of the machine base. The storage box is guided, moved toward the cutting edge of the round blade, and reciprocated between the first and second dead centers, and the storage box is driven via a crank mechanism and a belt provided in the machine base. a storage box drive motor, a detecting means for detect that the storage box to the passing position of the front position and the second dead point of said first dead point is reached, is connected to the storage box drive motor An inverter that changes the rotation speed of the storage box drive motor, a rotation speed setting means that is connected to the inverter and sets the rotation speed of the storage box drive motor, and a speed set by the rotation speed setting means V1 and a predetermined speed V2 set in advance Comparing means for compare, as a result of the comparison by the comparison means, when the V 1> V2, from the front position of said first dead point to the passage position of the second dead point, the storage box drive motor One feature is provided with control means for generating a command signal for driving at the predetermined speed V2 to the inverter .

  According to the present invention, even if the detection means breaks down while the meat box is reciprocating, the meat box reciprocates at a speed at which the slicer body does not swing out, so there is no need to fix the main body to the floor or the like. It can be moved easily, and the cleaning work around the main body becomes easy and workability is improved.

  As an embodiment of the present invention, a meat slicer that uses a meat chunk as a workpiece will be described with reference to FIGS. 1 is a front view of a meat slicer, FIG. 2 is a partially enlarged view of a crankshaft, FIGS. 3 and 5 are top views of FIG. 1, FIGS. 4 and 6 are partial right side views of FIG. 8 and 8 are right side views of FIG.

  In the figure, a round blade base 3 that supports a round blade 2 as a processing blade is provided upright on a machine base 1. The round blade 2 is rotationally driven by a round blade motor 5 serving as a machining blade motor via a belt 4. The meat box 6 serving as a storage box is provided so as to reciprocate toward the cutting edge of the round blade 2 using a rail 7 fixed to the upper part of the machine base 1 as a guide. The meat box 6 stores a meat chunk 13 as a workpiece, and the meat box 6 feeds the meat chunk 13 minutely toward the round blade 2 each time the meat box 6 reciprocates once in the meat box 6. 14 is provided. The meat box 6 is reciprocated by a meat box motor 11 serving as a storage box drive motor via a crank mechanism 8, a speed reducer 9 and a belt 10 provided in the machine base 1. The meat box motor 11 is connected to an inverter 12 serving as a speed change means, and the rotation of the meat box motor 11 is changed by changing the output frequency of the inverter 12. The inverter 12 is provided with a volume 21 serving as a rotation speed setting means that can set an arbitrary speed. Further, a comparison circuit 22 serving as a comparison means for outputting a signal when the rotation speed V1 set in advance in the inverter 12 and the speed V1 set by the signal of the volume 21 are exceeded and exceeds the rotation speed V2 set in advance. Is provided. As shown in FIG. 2, a rotary encoder that outputs a pulse signal proportional to the rotation of the crankshaft 15 serving as a detecting means for detecting a position near each dead point of the crankshaft 15 at the lower end of the crankshaft 15 of the crank mechanism 8. 16 is provided. By counting the pulse signals of the rotary encoder 16, the rotation angle of the crankshaft 15, that is, the positions near the dead points F and G of the crank mechanism 8 can be detected. Further, an operation switch 17 for outputting drive operation signals for the round blade motor 5 and the meat box motor 11 and a stop switch 19 for stopping the round blade motor 5 and the meat box motor 11 are provided on the front surface of the machine base 1.

  The signals of the operation switch 17 and the stop switch 19, the signal of the rotary encoder 16, and the signal output from the comparison circuit 22 in the inverter 12 are input to the sequencer 18 serving as control means. The sequencer 18 outputs to the inverter 12 a command signal of the speed V1 instructed by the drive and stop of the meat box motor 11 and the rotation speed setting means or a preset speed V2 to the inverter 12, and the round blade motor 5 It outputs excitation and demagnetization signals for the coil 20a of the electromagnetic switch 20 that drives and stops.

  Note that the speed V1 of the meat box motor 11 is set to an arbitrary speed by the volume 21, and the speed V2 is a limit speed at which the positional deviation is small when the meat box 6 stops and the slicer body does not start to shake. Set to V2. In the present embodiment, the speed V1 arbitrarily set by the rotation speed setting means is set to 30 to 80 times / minute in terms of the number of reciprocations of the meat box 6, and the preset speed V2 is set to 65 times / minute. In addition, the sequencer 18 preliminarily includes the number of pulses at the front position E of the dead point F on the round blade 2 side, which is the rotation angle of the crankshaft 15 in the vicinity of each dead point of the crank mechanism 8, and the dead side on the opposite side of the round blade 2. The number of pulses at the passing position H of the point G is input.

  In the above configuration, the operation of the slicer will be described. When the arbitrarily set speed V1 is 80 and the speed V1 is 80 times / minute in terms of the number of reciprocations of the meat box 6, the operation is as follows. When the meat block 13 is stored in the meat box 6 on the opposite side of the round blade 2 and the operation switch 17 is operated, the signal of the operation switch 17 is received by the sequencer 18, and the coil 20a of the electromagnetic switch 20 is excited. The round blade motor 5 is driven and a command signal and a drive signal at the speed V1 set by the volume 21 are output to the inverter 12, and the inverter 12 drives the meat box motor 11 at the rotation speed V1. At this time, since the speed V1 instructed by the volume 21 exceeds 65 times / minute of the preset rotation speed V2, a signal is output from the comparison circuit 21 in the inverter 12 to the sequencer 18. The meat box 6 moves forward through the belt 10, the speed reducer 9, and the crank mechanism 8 in the direction A of the round blade 2 side at a high speed with the rail 7 as a guide. At this time, the crankshaft 15 of the crank mechanism 8 also rotates synchronously, and the rotary encoder 16 outputs a pulse signal proportional to the rotation angle of the crankshaft 15. The sequencer 18 counts this pulse signal, counts the number of pulses until it reaches the position E before the dead center F of the crank mechanism 8 set in advance, and the signal is output from the comparison circuit 22. A command signal of speed V2 is output to the inverter 12.

  The inverter 12 decelerates the meat box motor 11 and drives it at a speed V2 (V1> V2). Therefore, the meat box 6 moves from the position E before the dead center F of the crank mechanism 8 at a speed V2 at which the main body does not start to shake. Thereby, the main body does not swing due to the inertial force of the meat box 6 near the dead center F on the round blade 2 side of the crank mechanism 8. The meat box 6 is moved in the backward direction in the arrow B direction opposite to the round blade 2 in the state of 65 times / minute.

  Next, when the sequencer 18 counts the number of pulses at the passing position H of the dead point G on the side opposite to the round blade 2, the sequencer 18 instructs the inverter 12 to rotate the rotation speed V1 indicated by the volume 21 at 80 times / minute. A signal is output and the meat box motor 11 is driven at a speed V1, that is, 80 times / minute. Therefore, after passing the dead center F on the round blade 2 side at 60 times / minute, the meat box 6 moves forward at a speed V1, that is, 80 times / minute. As a result, the inertia force of the meat box 6 near the dead center G on the opposite side of the round blade 2 of the crank mechanism 8 is reduced, and the slicing operation is performed at a slicing speed exceeding 65 times / minute without shaking the main body.

  When the signal of the rotary encoder 16 is not output due to some failure during the repetition of this operation, the sequencer 18 has a small positional deviation when stopping at the speed V2 set in advance in the inverter 12, In addition, the slicer body is fixed to a limit speed at which the main body does not shake and the forward and backward speeds are set to V2. As a result, even if a signal from the rotary encoder 16 is not output, the speed V2 at which the main body starts to shake, that is, 65 times / minute is not exceeded.

  Next, when the speed V1 instructed by the volume 21 is 65 times / minute or less, for example, 30 times / minute, the rotation speed V2 set in advance is 65 times / minute or less, so the comparison circuit 21 No signal is output from.

  For this reason, even if the rotary encoder 16 reaches the position E before the dead center F of the crank mechanism 8 set in advance and counts the number of pulses, the sequencer 18 does not output the speed command signal of the speed V2 to the inverter 12. The meat box 6 reciprocates at a speed of 30 times / min.

  As a result, there is little variation in the stop position of the meat box, and the speed is less than the limit speed V2 at which the main body swings, so that the inertia force of the meat box 6 is small and the main body does not swing. Further, since the meat box 6 does not decelerate at each dead center, one round trip time (30 times / minute) suitable for work, that is, the slice interval does not become long.

  In the present embodiment, the sequencer 18 is used as the control means, but the same effect can be obtained even if the same control is performed in the control means such as a microcomputer circuit or a logic circuit. Further, although the rotary encoder 16 is provided on the crankshaft 15 as means for detecting the position near the dead center of the crank mechanism 8, it may be provided on the rotating shaft of the meat box motor 11, the rotating shaft of the speed reducer, or the like. Although the rotary encoder 16 that outputs a pulse signal is used for position detection, a plurality of limit switches or the like may be used because it is sufficient to detect the vicinity of each dead point. The positions near the dead centers of the crank mechanism 8 may be detected on the reciprocating path of the meat box 6.

  Further, the comparison circuit for comparing the preset speed and the speed set by the rotation speed setting means is provided in the inverter 12, but it may be provided in the control means. Similarly, the signal of the rotation speed setting means is input to the inverter 12, but it may be input to the control means.

FIG. 1 is a front view of the meat slicer. It is the elements on larger scale of a crankshaft. It is a schematic top view of FIG. It is a schematic partial right view of FIG. It is a schematic top view of FIG. It is a schematic partial right view of FIG. It is a block circuit diagram. FIG. 2 is a schematic right side view of FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Round blade, 6 ... Meat box, 8 ... Crank mechanism, 5 ... Round blade drive motor, 11 ... Meat box motor, 16 ... Rotary encoder, 21 ... Volume, 22 ... Comparison circuit.

Claims (1)

A round blade (2) to be a processing blade arranged on the machine base (1);
A round blade motor (5) for rotationally driving the round blade (2);
A storage box (guided by a rail (7) fixed to the upper part of the machine base (1), moved toward the cutting edge of the round blade (2), and reciprocated between the first and second dead centers ( 6) and
A storage box drive motor (11) for driving the storage box (6) via a crank mechanism (8) and a belt (10) provided on the machine base (1);
Detecting means for detecting that the storage box has arrived at a position before the first dead center (E) and a passing position (H) of the second dead center ;
An inverter (12) connected to the storage box drive motor (11) and shifting the rotational speed of the storage box drive motor (11);
A rotation speed setting means (21) connected to the inverter (12) for setting the rotation speed of the storage box drive motor (11);
A comparison means (22) for comparing the speed V1 set by the rotation speed setting means with a predetermined speed V2 set in advance;
As a result of comparison by the comparison means (22), when V1> V2 , the storage box drive is performed from the position (E) before the first dead center to the passage position (H) of the second dead center. A slicer comprising: control means ( 18) for generating a command signal for driving the motor at the predetermined speed V2 to the inverter (12) .

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